While I disagree with you on it "only affect solo pve necros", I do completely agree that it was a very unnecessary buff to an already, by most accounts, struggling class.

Personally, I have yet to ever see an issue with passive ultimate gain, or doing methods to gain it before a combat; especially, again, for a class that's already hurting.

Unlike some others I've seen, I don't think any of this is "targeted" in a mean way at necro-players, but I absolutely think this is either some dev(s) being pretty daft, or just an effort to make the most recent/shiny class the best (Arcanist) to sell it more.

If it's the former, maybe something can be done about it; however if it's the latter (and most likely imo), then riiiiiip and fml because company B.S. will never stop.

They didn't just remove Necro's ability to generate corpses while out of combat, they also secretly removed their ability to consume corpses while out of combat.

If you generate a corpse while in combat, then finish combat, and the corpse is still there, you will not be able to consume it, despite being highlighted as consumable.